These are the results from the Noise figure measurements done during the Microwave meeting at Heelweg.

  heelweg-3-ehg.jpg (103216 bytes)

band Call gain nF (dB) remarks
70 cm PA3EXV 18.6 0.71 pre-amp 
23 cm PF2D 17.5 0.57 pre-amp
13 cm PA3EXV 38.0 3.0 pre amp with lower voltage applied nF=2.6dB
13 cm PA0T 9.6 3.8 after dc allignment nF=3.5 dB  PA2DOL design MGF1303
13 cm PA0T 18.1 2.7 pre-amp pa2dol design NE325
13 cm PF2D 12.1 0.74 pre-amp
13 cm PA7JB X 2.0 converter
13 cm PA0VVH 38.7 1.8 pre-amp, results after some tuning
9 cm PA7JB X 3.9 converter
9 cm PA0T 20.3 3.4 pre-amp
9 cm PA0T 11.8 1.4 pre-amp
9 cm PA0T 23.9 1.88 pre-amp pa2dol design NE325
9 cm PA0T 12.7 2.0 pre-amp pa2dol design MGF1303
6 cm PA7JB X 2.26 converter
6 cm PA0T 21.6 1.77 pre-amp, without cover 27.5 dB gain and 1.76 nF PA2DOL design MGF1303
6 cm PA0T 26.7 1.93 pre-amp pa2dol design NE325
10 GHz PA7JB X 6.9 converter
10 GHz PA0T 23.2 0.8 pre-amp
10 GHz DK2MN X 3.0 converter with cable and relais, measured at feedpoint
10 GHz DK2MN X 0.97 converter at pre-amp. when moving the cable we see lot of variation
24 GHz PA0T X 6.6 0.5 Watt power amp
24 GHz PA0T X 13.5 converter
24 GHz PA5AO 19.7 2.63 pre-amp
24 GHz PE1JPD 27 2.8 pre-amp not tuned
24 GHz PA0JCA 16.2 4.6 pre-amp, unstable